Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array

Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array

Bibliographic Details
Main Author: Damsel, Jonathan R.
Language:English
Published: Cleveland State University / OhioLINK 2019
Subjects:
Analytical Chemistry
Optics
Polymer Chemistry
Scientific Imaging
Brillouin
Etalon
High Resolution Spectroscopy
Hyperspectral Imaging
Interference Filter
Raman
Spectral Imaging
Spectroscopy
VIPA
Wavelength Discriminator
Wavelength Disperser
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=csu1579863912293855
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-csu15798639122938552021-08-03T07:13:46Z Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array Damsel, Jonathan R. Analytical Chemistry Optics Polymer Chemistry Scientific Imaging Brillouin Etalon High Resolution Spectroscopy Hyperspectral Imaging Interference Filter Raman Spectral Imaging Spectroscopy VIPA Wavelength Discriminator Wavelength Disperser To better understand adaptive materials that respond to biological stimuli and to design synthetic systems that biomimetic, non-destructive and non-invasive approaches to monitor both the chemical and mechanical dynamics of the system are needed. Raman spectroscopy provides a chemical fingerprint spectrum with diffraction limited spatial resolution. Similarly, Brillouin spectroscopy can reveal properties of the sample's elasticity tensor allowing for the determination of a range of mechanical properties including the Young's modulus and Poisson's ratio.Brillouin scattered light undergoes a very small shift relative to Raman scattered light and requires a different wavelength discrimination device capable to spectrally resolve the subtle shifts typical of Brillouin spectra. Historically, this has been achieved using multiple Fabry-Perot interferometers either in tandem or cascaded which limits the optical throughput. Recently, the virtually imaged phased array (VIPA) spectral discriminator has been used to resolve the Brillouin spectrum in biological samples. The VIPA has a higher throughput than Fabry-Perot interferometers and accepts a line of incident illumination, thereby extending the Brillouin imaging possibilities to the line scanning modality.In the work presented here, a theoretical framework for VIPAs has been developed. In addition, a fully generalized dispersion equation has been developed using geometrical optics, which relates the input optical field to the VIPA response for both isotropic and anisotropic dielectrics. Hence, the dispersion relation is well suited for designing tunable VIPA elements that would enable high spectral resolution in a fixed image plane. In addition to the full theoretical description, two VIPA devices, one commercially produced and the other fabricated as part of this work, were characterized. A comparison between the theoretical predictions and the observed VIPA performance are presented. 2019 English text Cleveland State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=csu1579863912293855 http://rave.ohiolink.edu/etdc/view?acc_num=csu1579863912293855 restricted--full text unavailable until 2022-01-24 This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Analytical Chemistry
Optics
Polymer Chemistry
Scientific Imaging
Brillouin
Etalon
High Resolution Spectroscopy
Hyperspectral Imaging
Interference Filter
Raman
Spectral Imaging
Spectroscopy
VIPA
Wavelength Discriminator
Wavelength Disperser
spellingShingle Analytical Chemistry
Optics
Polymer Chemistry
Scientific Imaging
Brillouin
Etalon
High Resolution Spectroscopy
Hyperspectral Imaging
Interference Filter
Raman
Spectral Imaging
Spectroscopy
VIPA
Wavelength Discriminator
Wavelength Disperser
Damsel, Jonathan R.
Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array
author Damsel, Jonathan R.
author_facet Damsel, Jonathan R.
author_sort Damsel, Jonathan R.
title Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array
title_short Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array
title_full Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array
title_fullStr Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array
title_full_unstemmed Wavelength Discrimination for Spectroscopy and Spectral Imaging Using a Phased Array
title_sort wavelength discrimination for spectroscopy and spectral imaging using a phased array
publisher Cleveland State University / OhioLINK
publishDate 2019
url http://rave.ohiolink.edu/etdc/view?acc_num=csu1579863912293855
work_keys_str_mv AT damseljonathanr wavelengthdiscriminationforspectroscopyandspectralimagingusingaphasedarray
_version_ 1719456554292346880

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